LICHALP

Polyblastia dominans (Arnold) Zahlbr.

Syn.: Thelidium dominans Arnold

Lichenised.

Substrate: calciferous rocks

Altitudinal range: from the montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies) to the alpine belt (potential vegetation: treeless Alpine grasslands and tundras, to the lower limit of perennial snow and the equilibrium line of glaciers)

Note: a species resembling P. sepulta (with which it is sometimes merged), with a thin to entirely endolithic thallus and ascomata immersed in pits, lacking an involucrellum, but the narrow ellipsoid ascospores larger, with 3 transversal septa and occasionally an incomplete longitudinal septum; on calcareous rocks; widespread in Europe and most frequent in the Central European mountains; from the Alps there are only a few scattered records.